{"answers":{"affected":"4 open source packages ship an affected version, including org.yamcs:yamcs-core.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-55566 exists.","fix":"Upgrade org.yamcs:yamcs-core to a fixed version for your release line: 5.12.8 or 5.13.2.","what":"CVE-2026-55566 is a medium-severity cross-site scripting vulnerability in yamcs, published on 28 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-55566 and fix it if it is affected.\n\nWhat it is: CVE-2026-55566 is a medium-severity cross-site scripting vulnerability in yamcs, published on 28 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-55566 exists.\n\nAffected packages and fixed versions:\n- org.yamcs:yamcs-core (Maven): affected all versions; fixed in 5.12.8\n- org.yamcs:yamcs-core (Maven): affected all versions; fixed in 5.12.8\n- org.yamcs:yamcs-core (Maven): affected from 5.13.0; fixed in 5.13.2\n- org.yamcs:yamcs-core (Maven): affected from 5.13.0; fixed in 5.13.2\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-55566/ (Markdown: https://insights.sbomify.com/CVE-2026-55566/index.md)","id":"CVE-2026-55566","markdown":"https://insights.sbomify.com/CVE-2026-55566/index.md","name":"CVE-2026-55566","record":{"aliases":["GHSA-9272-wg2r-7xmx"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["code_execution","data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"Yamcs mission control","requires_auth":"none","summary":"Attackers can execute arbitrary JavaScript in user browsers via crafted URLs in Yamcs, potentially reading data or performing actions.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":4.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"Yamcs is a mission control framework. Prior to 5.12.8 and 5.13.2, Yamcs processes attacker-controlled data from the /ext URL route in yamcs-web/src/main/webapp/projects/webapp/src/app/core/routes/extension.matcher.ts, extension.component.ts, and app.component.ts without checking registered plugin IDs before DOM rendering through innerHTML. A crafted URL can execute JavaScript when opened by a user. The script can read data available to the Yamcs web application and perform actions in the user context. This issue is fixed in versions 5.12.8 and 5.13.2.","ecosystems":["Maven"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Yamcs: DOM XSS in Extension Routing","id":"CVE-2026-55566","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Maven","product":null,"products":[],"type":"xss","year":"2026"},"n_packages":4,"n_references":5,"next":{"headline":"BleachBit: Exploit File Delete to Escalate Privilege","id":"CVE-2026-55567"},"packages":[{"ecosystem":"Maven","fixed":["5.12.8"],"introduced":["0"],"last_affected":[],"package":"org.yamcs:yamcs-core","purl":null,"source":"GHSA-9272-wg2r-7xmx"},{"ecosystem":"Maven","fixed":["5.12.8"],"introduced":["0"],"last_affected":[],"package":"org.yamcs:yamcs-core","purl":"pkg:maven/org.yamcs/yamcs-core","source":"GHSA-9272-wg2r-7xmx"},{"ecosystem":"Maven","fixed":["5.13.2"],"introduced":["5.13.0"],"last_affected":[],"package":"org.yamcs:yamcs-core","purl":null,"source":"GHSA-9272-wg2r-7xmx"},{"ecosystem":"Maven","fixed":["5.13.2"],"introduced":["5.13.0"],"last_affected":[],"package":"org.yamcs:yamcs-core","purl":"pkg:maven/org.yamcs/yamcs-core","source":"GHSA-9272-wg2r-7xmx"}],"prev":{"headline":"Yamcs: Authenticated remote code execution via unescaped StreamSQL `LIKE` pattern compiled by Janino (`LikeExpression`)","id":"CVE-2026-55565"},"products":["yamcs"],"published":"2026-08-28","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-08-28","vendors":["yamcs"]},"summary":"Attackers can execute arbitrary JavaScript in user browsers via crafted URLs in Yamcs, potentially reading data or performing actions.","url":"https://insights.sbomify.com/CVE-2026-55566/"}